Design a primary anaerobic digester using data.

Input data:

Population: $67,000$ inhabitants

Average influent flow: $Q=9,820\frac{m^3}{d}$

Influent SS load: $3,720k\frac{g}{d}$

Influent SS concentration: $SS=379m\frac{g}{L}$

SS removal efficiency in the primary clarifier: $60\%($assumed

Mixed sludge load to digester: $3,307kgT\frac{S}{d}$

Influent sludge flow: $Q=64\mathrm{.}2\frac{m^3}{d}$

VS$/$TS ratio $=0\mathrm{.}77$

Requirements:

$($a$)$ Digester volume

$($b$)$ Hydraulic detention time

$($c$)$ Primary digester effluent sludge $($influent sludge to secondary digester$)$

$($d$)$ Heat balance in digester